Question: Tell me recurring event whose name has the word worldcon in it.
Paraphrase: Tell me recurring event, the name of which contains the word worldcon.
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q15275719 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'worldcon')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: Worldcon, Worldcon